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McAfee Security Bulletin: Network Security Appliance software update fixes a vulnerability in the IPC object implementation within the Linux kernel
Security Bulletins ID:   SB10146
Last Modified:  4/7/2017
Rated:


Summary

First Published: 1/11/2016
 
 Impact of Vulnerability:  Privilege Escalation (CWE-274)
 CVE Numbers:  CVE-2015-7613
 Severity Rating:  Medium
 Base / Overall CVSS v2 Scores:  6.9
 Recommendations:  Install or update to the software versions listed in the Remediation table below.
 Security Bulletin Replacement:  None
 Affected Software:  All NSP appliances (I/M/NS series) prior to the versions with the fix. See the Remediation table below for the various software versions with the fix.
 Location of Updated Software:  Contact Technical Support for the fix download.

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Article contents:

Description

This vulnerability is caused by a race condition in the IPC object implementation in the Linux kernel. It can allow local users to gain privileges exposing information or causing a Denial of Service (DoS) attack.

CVE-2015-7613
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-7613

Affected Component:
  • Network Security Platform Appliance software

Remediation

All software versions prior to those listed in the table below include a kernel with the vulnerability.

Contact Technical Support or check the Product Downloads site and download the applicable product hotfix/maintenance release (MR) software:
 
Network Security Platform Appliance Type (Hotfix/MR) Use Below Version or Later Release Date
I-series – 7.1 Hotfix 7.1.1.25 December 11, 2015
M-series – 7.1 Hotfix 7.1.3.145 December 24, 2015
M-series – 8.1 Hotfix 8.1.3.96 December 29, 2015
M-series – 8.1 (FIPS SW) Hotfix 8.1.15.15 December 4, 2015
M-series – 8.2 Hotfix 8.2.3.106 January 19, 2016
NS-series – 7.1 Hotfix 7.1.5.126 December 23, 2015
NS-series – 8.1 (9x00, 7x00) Hotfix 8.1.5.150 November 20, 2015
NS-series – 8.1 (FIPS SW) Hotfix 8.1.17.21 December 18, 2015
NS-series – 8.2 Hotfix 8.2.5.124 February 2, 2016
VM-series – 8.1 Hotfix 8.1.7.32 January 8, 2016
VM-series – 8.2 Hotfix 8.2.7.x January 22, 2016 (ETA)

Download and Installation Instructions
See KB56057 for instructions on how to download McAfee products, documentation, security updates, patches, and hotfixes. Review the Release Notes and the Installation Guide, which you can download from the Documentation tab, for instructions on how to install these updates.

Product Specific Notes

These hotfixes may include other updates in addition to the fixes made to the Linux kernel for this vulnerability. For details, please refer to the Release Notes of each version.

Workaround

None. Install the platform specific hotfix/MR software updates.

Mitigations

None. Install the platform specific hotfix/MR software updates.

Acknowledgements

McAfee credits Dmitry Vyukov from Google and Gerald Elliott from US Army for reporting this flaw.

Frequently Asked Questions (FAQs)

How do I know whether my McAfee product is vulnerable or not?

For Endpoint products:
Use the following instructions for endpoint or client based products:
  1. Right-click on the McAfee tray shield icon on the Windows task bar.
  2. Select Open Console.
  3. In the console, select Action Menu.
  4. In the Action Menu, select Product Details. The product version is displayed.
For ePO:
Check the version and build of ePO that is installed. For information on how to check the version, see KB52634.

For Appliances:
Use the following instructions for Appliance based products:
  1. Open the Administrator's User Interface (UI).
  2. Click the About link. The product version is displayed.
What is CVSS?
CVSS, or Common Vulnerability Scoring System, is the result of the National Infrastructure Advisory Council’s effort to standardize a system of assessing the criticality of a vulnerability. This system offers an unbiased criticality score between 0 and 10 that customers can use to judge how critical a vulnerability is and plan accordingly. For more information, please visit the CVSS website at: http://www.first.org/cvss/.

When calculating CVSS v2 scores, McAfee has adopted a philosophy that fosters consistency and repeatability. Our guiding principle for CVSS scoring is to score the exploit under consideration by itself. We consider only the immediate and direct impact of the exploit under consideration. We do not factor into a score any potential follow-on exploits that might be made possible by successful exploitation of the issue being scored.

CVSS v3 scoring is in final review as of March 2015. CVSS v2 will be replaced with CVSS v3 when v3 is fully approved.
https://www.first.org/cvss/v3/development
https://www.first.org/cvss/calculator/3.0
 
What are the CVSS scoring metrics that have been used?
 
CVE-2015-7613: Race condition in Linux kernel IPC implementation
 
CVSS v2.0 Scoring:
 
 Base Score 6.9
 Related exploit range (AccessVector) Local (L)
 Attack complexity (AccessComplexity) Medium (M)
 Level of authentication needed (Authentication) None (N)
 Confidentiality impact Complete (C)
 Integrity impact Complete (C)
 Availability impact Complete (C)

NOTE: The below CVSS version 2.0 vector was used to generate this score.
http://nvd.nist.gov/cvss.cfm?calculator&version=2&vector=(AV:L/AC:M/Au:N/C:C/I:C/A:C)

Where can I find a list of all security bulletins or how do I report a product vulnerability?
To find a list of all security bulletins, or if you have information about a security issue or vulnerability with a McAfee product, please visit our product security website at: http://www.mcafee.com/us/threat-center/product-security-bulletins.aspx.

Resources

To contact Technical Support, log on to the ServicePortal and go to the Create a Service Request page at https://support.mcafee.com/ServicePortal/faces/serviceRequests/createSR:
  • If you are a registered user, type your User Id and Password, and then click Log In.
  • If you are not a registered user, click Register and complete the required fields. Your password and logon instructions will be emailed to you.

Disclaimer

The information provided in this security bulletin is provided as is without warranty of any kind. McAfee disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall McAfee or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits, or special damages, even if McAfee or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
 
Any future product release dates mentioned in this security bulletin are intended to outline our general product direction and they should not be relied on in making a purchasing decision. The product release dates are for information purposes only, and may not be incorporated into any contract. The product release dates are not a commitment, promise, or legal obligation to deliver any material, code, or functionality. The development, release, and timing of any features or functionality described for our products remains at our sole discretion and may be changed or cancelled at any time.

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